期刊
ATMOSPHERIC ENVIRONMENT
卷 42, 期 10, 页码 2405-2414出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.atmosenv.2007.12.020
关键词
black carbon; char; soot; Char-/soot-EC ratios; thermal/optical reflectance (TOR) method
PM2.5 and TSP samples were collected at Lake Daihai, a rural high-mountain area in China, in four seasons during 2005-2007. Organic carbon (OC), elemental carbon (EC), char-EC, and soot-EC were analyzed using the thermal/optical reflectance (TOR) method with different temperature plateaus and oxidation atmospheres. TC, OC, EC, and char-EC concentrations of TSP and PM2.5 showed seasonal variations with the highest concentrations in winter and the lowest in Summer, while soot-EC reveals a little different variation, with the highest concentration in spring, indicating different source contributions from other parameters. OC/EC correlations were weaker at Daihai than those from urban areas. Although little differences existed in TSP and PM2.5, average OC/EC ratios varied seasonally and ranged from similar to 9.0 in winter to similar to 5.0 in spring. Char-/soot-EC ratios showed similar pattern, with the highest average ratios (> 3.0) in winter, consistent with the contributions from residential biomass burning and coal combustion. Back trajectories related the highest carbon concentrations with the southeasterly air masses and the lowest carbon levels with northward flows. (c) 2007 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据